#include<stdio.h>

int main()
{
	char box1[] = "abcdef";
	char box2[] = { 'a','b','c','d','e','f' };
	char box3[] = { 'a','b','c','d','e','f','\0' };
	printf("%s\n", box1);
	printf("%s\n", box2);
	printf("%s\n", box3);
	return 0;
}